Daria Saville's fantastic run at the Miami Open has come to an abrupt end with Olympic champion Belinda Bencic dominating their quarterfinal.

Saville, just the fourth wildcard in the WTA 1000 tournament's history to reach the last eight, was thoroughly outplayed by Bencic in a 6-1, 6-2 defeat for the Australian.

The 22nd-seeded Bencic needed just 69 minutes to advance to the last four in Miami for the first time.

Saville had her serve broken three times in each set and she only converted on one of her break-point opportunities.

The match's early games were tight as Bencic broke on her third chance in the opening game and saved five break points against her for a 2-0 advantage.

Saville got back to 2-1 before Swiss ace Bencic reeled off the next straight games in a row.

But Saville stopped the rot and broke serve before getting back to 4-2 only for Bencic to win eight of the last nine points to seal a comprehensive victory.

Despite the defeat, the 28-year-old Saville will leap up the rankings from 249th to world number 122 -- having been 627th in mid-February as she embarks on a career renaissance after Achilles surgery last year.

World number 28 Bencic, who is yet to face a seeded player in the tournament, has won 48 of the 65 games she's played in her four matches.

AAP